May 12th, 2015
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The SQL statement selects contacts customer names State and phone number from Customers table

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SQL WORKName: Janice WillisINF322: Database Management SystemsInstructor: Andrew HelfenbergerDate: April 27, 2015SQL STATEMENTSSELECT Customer_fname, Customer_lname, address, email, phone no, married, gender FROM Customers;ExplanationSQL statement returns the contacts first name, last name, the address, e-mail, phone number, marital status and the gender from the customers tableUPDATE customersSET address= kennga12,email= kennga @hotmail.com,WHERE Customer_fname= typo and Customer_lname=Nityahan;The SQL statement changes the details in the address field and Email from gakenn72 and typo@hotmail.com to kennga and kennga@hotmail.com respectively.DELETE FROM CustomersWHERE Customer_fname= Nilsen AND Customer_lname= mohan;The SQL statement removes the records of kilopSaho from the customers table;TWOALTER TABLE customersADD birthday date;The SQL statement adds a new field birthday to the table customersSELECT Customerfname, Customerlname, State, PhonenoFROM Customers; The SQL statement selects contacts customer names State and phone number from Customers tableSELECT Customer_fname, Customer_lnameFROM CustomersWHERE birthday IS NOT NULL; This SQL statement returns contact names who have the birthday field filled in.Referential integrity is a database concept that ensures that relationships between tables remain where one table has

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